Thermal management system and control method therefor, vehicle, and storage medium

Abstract

The present application relates to the technical field of vehicles, and relates to a thermal management system and a control method therefor, a vehicle, and a storage medium. The thermal management system comprises a power battery, a motor, a heater core, a compressor, an evaporator core, a motor radiator, a low-temperature radiator, a heater, a battery water pump, a motor water pump, a heating water pump, a water-cooled condenser, a battery cooler, a multi-way valve, and a connector; the connector is separately connected to an outlet of the power battery, an inlet of the motor, an outlet of the heater core, an inlet of the motor radiator, an outlet of the low-temperature radiator, an inlet of the battery water pump, an outlet of the motor water pump, a cooling liquid inlet of the water-cooled condenser, a cooling liquid outlet of the battery cooler, and a cooling liquid inlet of the battery cooler. The present application realizes high integration of a battery cooling loop, a motor cooling loop, and a passenger compartment loop, and reduces assembly parts, thus meeting lightweight requirements for new energy automobiles.

Description

Thermal management system, control method thereof, vehicle, and storage medium Technical Field

[0001] The present application relates to the field of vehicle technology, in particular to the field of thermal management technology in vehicles, and specifically to a thermal management system and a control method thereof, a vehicle, and a storage medium. Background Art

[0002] Compared to traditional fuel vehicles, new energy vehicles have more circuits in their thermal management systems, such as electric drive cooling, battery heating, and passenger compartment cooling. Each additional circuit increases the number of vehicle components, as well as their cost and weight.

[0003] As new energy vehicles increase in weight, their power consumption increases and their driving range decreases. Therefore, how to design a thermal management system to meet the lightweight requirements of new energy vehicles is a technical problem that needs to be solved urgently.

[0004] Summary of the Invention

[0005] This application provides a thermal management system and its control method, a vehicle, and a storage medium to achieve high integration of the battery cooling circuit, the motor cooling circuit, and the passenger compartment cooling circuit, thereby reducing the number of assembled parts and meeting the lightweight requirements of new energy vehicles. The technical solutions of this application are as follows:

[0006] According to a first aspect of the present application, a thermal management system is provided, which includes a power battery, a motor, a heater core, a compressor, an evaporator core, a motor radiator, a low-temperature radiator, a heater, a battery water pump, a motor water pump, a heating water pump, a water-cooled condenser, a battery cooler, a multi-way valve, and a connector; the connector is respectively connected to the outlet of the power battery, the inlet of the motor, the outlet of the heater core, the inlet of the motor radiator, the outlet of the low-temperature radiator, the inlet of the battery water pump, the outlet of the motor water pump, the coolant inlet of the water-cooled condenser, the cold liquid outlet of the battery cooler, and the cold liquid inlet of the battery cooler; the motor The inlet of the water pump is connected to the outlet of the motor, the inlet of the motor is connected to the outlet of the motor radiator, the outlet of the heater is connected to the inlet of the low-temperature radiator and the inlet of the heater core respectively through a multi-way valve, the inlet of the heater is connected to the coolant outlet of the water-cooled condenser, the outlet of the battery water pump is connected to the inlet of the power battery, the inlet of the evaporator core is connected to the refrigerant outlet of the water-cooled condenser, the refrigerant inlet of the water-cooled condenser is connected to the refrigerant outlet of the compressor, the inlet of the compressor is connected to the outlet of the evaporator core, the refrigerant outlet of the battery cooler is connected to the refrigerant inlet of the compressor, and the coolant outlet of the heating water pump is connected to the inlet of the heater.

[0007] According to the above technical means, the power battery, motor, compressor, heater core, evaporator core, motor radiator, low-temperature radiator, heater, battery water pump, motor water pump, heating water pump, water-cooled condenser, battery cooler, multi-way valve, and connector are connected through connectors, achieving a high degree of integration of the battery cooling circuit, motor cooling circuit, and passenger compartment circuit, reducing the number of assembly parts, thereby meeting the lightweight requirements of new energy vehicles. In addition, by controlling the flow of coolant and refrigerant through connectors and multi-way valves, the coolant circuit and refrigerant circuit are simultaneously realized, which can meet the thermal management of the power battery, motor, and / or passenger compartment, meeting the thermal management requirements of multiple scenarios.

[0008] In one possible embodiment, the multi-way valve is a first three-way valve, and the connector is a nine-way valve. The first end of the nine-way valve is connected to the inlet of the motor water pump, the second end of the nine-way valve is connected to the inlet of the battery water pump, the third end of the nine-way valve is connected to the coolant inlet of the battery cooler, the fourth end of the nine-way valve is connected to the coolant outlet of the battery cooler, the fifth end of the nine-way valve is connected to the inlet of the motor radiator, the sixth end of the nine-way valve is connected to the outlet of the low-temperature radiator and the outlet of the heater core respectively, the seventh end of the nine-way valve is connected to the coolant inlet of the water-cooled condenser, the eighth end of the nine-way valve is connected to the outlet of the battery, and the ninth end of the nine-way valve is connected to the inlet of the motor. The first end of the three-way valve is connected to the outlet of the heater, the second end of the three-way valve is connected to the inlet of the low-temperature radiator, and the third end of the three-way valve is connected to the inlet of the heater core.

[0009] The above-mentioned technical approach integrates the battery cooling circuit, motor cooling circuit, and passenger compartment cooling circuit through a single three-way valve and a nine-way valve, reducing the number of assembly parts and thus meeting the lightweight requirements of new energy vehicles. Furthermore, by controlling the connectivity of the three-way and nine-way valves, the battery cooling circuit, motor cooling circuit, and passenger compartment cooling circuit are controlled, thus enabling flexible control of the thermal management system.

[0010] In one possible embodiment, the thermal management system has a first working mode, a second working mode, a third working mode, a fourth working mode and a fifth working mode; in the first working mode, the first end of the nine-way valve is connected to the fifth end of the nine-way valve, the second end of the nine-way valve is connected to the fourth end of the nine-way valve, the third end of the nine-way valve is connected to the eighth end of the nine-way valve, the sixth end of the nine-way valve is connected to the seventh end of the nine-way valve, the ninth end of the nine-way valve is closed, the first end and the second end of the three-way valve are both open, and the third end of the three-way valve is closed; in the second working mode, the first end of the nine-way valve is connected to the third end of the nine-way valve, the second end of the nine-way valve is connected to the fourth end of the nine-way valve, the fifth end of the nine-way valve is connected to the eighth end of the nine-way valve, the sixth end of the nine-way valve is connected to the seventh end of the nine-way valve, the ninth end of the nine-way valve is opened, and the first end, the second end and the third end of the three-way valve are all open; in the third working mode, the first end of the nine-way valve is connected to the third end of the nine-way valve, the first end of the nine-way valve is connected to the third end of the nine-way valve, the first end of the nine-way valve The second end is connected to the sixth end of the nine-way valve, the fourth end of the nine-way valve is connected to the ninth end of the nine-way valve, the eighth end of the nine-way valve is connected to the seventh end of the nine-way valve, the fifth end of the nine-way valve is closed, the first end of the three-way valve and the third end of the three-way valve are both open, and the second end of the three-way valve is closed; in the fourth working mode, the first end of the nine-way valve is connected to the third end of the nine-way valve, the second end of the nine-way valve is connected to the eighth end of the nine-way valve, the fifth end of the nine-way valve is connected to the fourth end of the nine-way valve, and the sixth end of the nine-way valve is connected to the The seventh end is connected, the ninth end of the nine-way valve is opened, and the first end of the three-way valve, the second end of the three-way valve and the third end of the three-way valve are all opened; in the fifth working mode, the first end of the nine-way valve is connected with the second end of the nine-way valve, the fourth end of the nine-way valve is connected with the seventh end of the nine-way valve, the fifth end of the nine-way valve is connected with the sixth end of the nine-way valve, the third end of the nine-way valve is connected with the eighth end of the nine-way valve, the fifth end of the nine-way valve is closed, and the first end of the three-way valve, the second end of the three-way valve and the third end of the three-way valve are all opened.

[0011] According to the above technical means, by controlling the connectivity of the nine-way valve with the three-way valve, the thermal management system can achieve multiple working modes to precisely control the vehicle.

[0012] In one possible embodiment, the multi-way valve is a first three-way valve, and the connector includes a first four-way valve, a second four-way valve, a third four-way valve and a second three-way valve. The first end of the first four-way valve is connected to the inlet of the battery water pump, the second end of the first four-way valve is connected to the second end of the second four-way valve, the third end of the first four-way valve is connected to the coolant inlet of the battery cooler, and the fourth end of the first four-way valve is connected to the outlet of the motor water pump; the first end of the second four-way valve is connected to the coolant outlet of the battery cooler, the third end of the second four-way valve is connected to the first end of the third four-way valve, and the fourth end of the second four-way valve is connected to the first end of the second three-way valve; the second end of the third four-way valve is connected to the outlet of the power battery, the third end of the third four-way valve is connected to the inlet of the heating water pump, and the fourth end of the third four-way valve is respectively connected to the outlets of the low-temperature radiator and the heater core; the second end of the second three-way valve is connected to the inlet of the motor radiator, and the third end of the second three-way valve is connected to the inlet of the motor radiator.

[0013] In a possible implementation, the thermal management system further includes a flow channel plate, and the battery water pump, motor water pump, heating water pump, water-cooled condenser, battery cooler and connector are integrated on the flow channel plate.

[0014] According to the above technical means, by integrating the battery water pump, motor water pump, heating water pump, water-cooled condenser, battery cooler and connector into a flow channel plate, the number of parts such as mounting brackets is reduced, the vehicle cost is reduced, and the vehicle is lightweight.

[0015] In a possible implementation, the thermal management system further includes a water storage bottle, and the outlet of the water storage bottle is respectively connected to the motor and the motor water pump.

[0016] In a possible embodiment, the thermal management system further includes a liquid storage drying bottle, the inlet of the liquid storage drying bottle is connected to the refrigerant outlet of the water-cooled cooler, and the outlet of the liquid storage drying bottle is connected to the inlet of the evaporator core.

[0017] According to the second aspect of the present application, a control method for a thermal management system is provided. The thermal management system includes a thermal management system as in the first aspect. The control method includes: obtaining the current ambient temperature and determining the operating mode of the thermal management system based on the current ambient temperature to perform thermal management of the power battery, motor and / or passenger compartment.

[0018] In one possible embodiment, the thermal management system includes the thermal management system of the first aspect, which determines the operating mode of the thermal management system based on the current ambient temperature, including: if the current ambient temperature is greater than or equal to a first preset threshold, controlling the thermal management system to enter the first operating mode; if the current ambient temperature is greater than or equal to a second preset threshold and less than the first preset threshold, controlling the thermal management system to enter the second operating mode or the fourth operating mode; if the current ambient temperature is less than the second preset threshold, controlling the thermal management system to enter the third operating mode or the fourth operating mode.

[0019] In one possible embodiment, if the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, the thermal management system is controlled to enter the second working mode or the fourth working mode, including: if the current ambient temperature is greater than or equal to the second preset threshold, less than the first preset threshold and the power battery mode is cooling mode, the thermal management system is controlled to enter the second working mode; if the current ambient temperature is greater than or equal to the second preset threshold, less than the first preset threshold and the power battery mode is average temperature mode, the thermal management system is controlled to enter the fourth working mode; if the current ambient temperature is less than the second preset threshold, the thermal management system is controlled to enter the third working mode or the fourth working mode, including: if the current ambient temperature is less than the second preset threshold and the power battery mode is heating mode, the thermal management system is controlled to enter the third working mode; if the current ambient temperature is less than the second preset threshold and the power battery mode is average temperature mode, the thermal management system is controlled to enter the fourth working mode.

[0020] In a possible implementation, the control method further includes: in response to a maintenance operation, controlling the thermal management system to enter a fifth operating mode.

[0021] According to a third aspect of the present application, a vehicle is provided, comprising the thermal management system according to the first aspect.

[0022] According to a fourth aspect of the present application, a computer-readable storage medium is provided for storing computer-readable instructions. When the computer-readable instructions are executed by a processor, the processor executes the control method according to the second aspect.

[0023] The thermal management system provided by this application has the following beneficial effects: by connecting the power battery, motor, compressor, heater core, evaporator core, motor radiator, low-temperature radiator, heater, battery water pump, motor water pump, heating water pump, water-cooled condenser, battery cooler, multi-way valve and connector through connectors, a high degree of integration of the battery cooling circuit, motor cooling circuit and passenger compartment circuit is achieved, reducing the number of assembly parts, thereby meeting the lightweight requirements of new energy vehicles. In addition, by controlling the flow of coolant and refrigerant through connectors and multi-way valves, the coolant circuit and refrigerant circuit are simultaneously realized, which can meet the thermal management of the power battery, the motor and / or the passenger compartment, and meet the requirements of multiple thermal management scenarios.

[0024] It should be noted that the technical effects brought about by any implementation method in the second to fourth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0025] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic diagram of a thermal management system according to an embodiment of the present invention;

[0027] FIG2 is a second structural diagram of a thermal management system provided in an embodiment of the present application;

[0028] FIG3 is a third structural diagram of a thermal management system provided in an embodiment of the present application;

[0029] FIG4 is a schematic diagram of the structure of a flow channel plate provided in an embodiment of the present application;

[0030] FIG5 is a second structural schematic diagram of a flow channel plate provided in an embodiment of the present application;

[0031] FIG6 is a schematic structural diagram of a nine-way valve provided in an embodiment of the present application;

[0032] FIG7 is a flow chart of a control method of a thermal management system provided in an embodiment of the present application;

[0033] FIG8 is a flowchart of determining the working mode provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to enable ordinary people in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0035] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0036] Explanation of terms

[0037] An electronic expansion valve (EXV) is a pre-programmed throttling control element with electronic regulation. It uses the electrical signal generated by the regulated parameter to control the voltage or current applied to the expansion valve, thereby regulating the liquid supply.

[0038] A positive temperature coefficient (PTC) heater uses a PTC ceramic heating element and an aluminum tube. This type of PTC heater offers low thermal resistance and high heat transfer efficiency, making it an automatic, energy-efficient electric heater.

[0039] Briefly introduce the application scenarios involved in this application

[0040] Compared to traditional fuel-powered vehicles, new energy vehicles have more circuits in their thermal management systems, such as electric drive cooling, battery heating, and passenger compartment cooling. Each circuit is an independent system. Consequently, each additional circuit increases the number of vehicle components, cost, and weight.

[0041] As new energy vehicles increase in weight, their power consumption increases and their driving range decreases. Therefore, how to design a thermal management system to meet the lightweight requirements of new energy vehicles is a technical problem that needs to be solved urgently.

[0042] In addition, in some related technical solutions, a thermal management system for electric vehicles is disclosed, in which a heat pump assembly is integrated with a plate heat exchanger, a water-cooled condenser, an electronic water pump, a gas-liquid separator and an expansion water tank. The heat pump assembly has interfaces for connecting to the thermal management object, the front-end module assembly, the temperature, humidity, air cleanliness and air circulation control system (heating, ventilation, air-conditioning and cooling, HVAC) assembly and the electric compressor respectively. The thermal management object, the front-end module assembly, the HVAC assembly and the electric compressor are respectively connected to the heat pump assembly through corresponding interfaces.

[0043] Some technical solutions disclose an electric vehicle thermal management circuit system and control method thereof, involving an integrated module connected to a compressor, an off-board heat exchanger, and an air conditioning unit assembly. The integrated module is connected to an in-vehicle evaporator via a first refrigerant interface, to the refrigerant outlet of an in-vehicle condenser via a second refrigerant interface, to a first end of an off-vehicle heat exchanger via a third refrigerant interface, to a second section of the off-vehicle heat exchanger via a fourth refrigerant interface, and to a compressor inlet via a fifth refrigerant interface.

[0044] In some technical solutions, the disclosed thermal management integrated module includes a mounting bracket, a heat exchanger and at least one flow distribution component. The heat exchanger and the flow distribution component are both installed on the mounting bracket. A flow distribution cavity is provided in the mounting bracket. The heat exchanger and the flow distribution component are respectively connected to the flow distribution cavity. The flow distribution component is used to divert the coolant after passing through the heat exchanger.

[0045] It can be seen that in the related art, the thermal management system still has the following technical problems:

[0046] 1) Single function: It cannot realize the multi-scenario circuit linkage requirements of the vehicle battery, electric drive and passenger compartment, and cannot realize the reasonable recovery and utilization of energy.

[0047] 2) Low reliability: There are many connecting pipes, and there are hidden dangers such as leakage during long-term use.

[0048] 3) Poor processability: The pipeline layout is complicated, takes up a lot of space, and is not easy to disassemble and assemble.

[0049] To address the above problems, as shown in Figure 1, the present application provides a thermal management system 100, which includes a power battery 1, a motor 2, a compressor 3, a heater core 4, an evaporator core 5, a motor radiator 6, a low-temperature radiator 7, a heater 8, a battery water pump 9, a motor water pump 10, a heating water pump 11, a water-cooled condenser 12, a battery cooler 13, a multi-way valve 14 and a connector 15.

[0050] The connector 15 is respectively connected to the outlet of the power battery 1, the inlet of the motor 2, the outlet of the heater core 4, the inlet of the motor 2 radiator, the outlet of the low-temperature radiator 7, the inlet of the battery water pump 9, the outlet of the motor water pump 10, the coolant inlet of the water-cooled condenser 12, the coolant outlet of the battery cooler 13, and the coolant inlet of the battery cooler 13;

[0051] The inlet of the motor water pump 10 is connected to the outlet of the motor 2, and the inlet of the motor 2 is connected to the outlet of the radiator of the motor 2.

[0052] The outlet of the heater 8 is connected to the inlet of the low-temperature radiator 7 and the inlet of the heater core 4 through the multi-way valve 14 respectively, the inlet of the heater 8 is connected to the coolant outlet of the water-cooled condenser 12, the outlet of the battery water pump 9 is connected to the inlet of the power battery 1, the inlet of the evaporator core 5 is connected to the refrigerant outlet of the water-cooled condenser 12, the refrigerant inlet of the water-cooled condenser 12 is connected to the refrigerant outlet of the compressor 3, the inlet of the compressor 3 is connected to the outlet of the evaporator core 5, the refrigerant outlet of the battery cooler 13 is connected to the refrigerant inlet of the compressor 3, and the coolant outlet of the heating water pump 11 is connected to the inlet of the heater 8.

[0053] In this way, the power battery 1, motor 2, compressor 3, heater core 4, evaporator core 5, motor 2 radiator 6, low-temperature radiator 7, heater 8, battery water pump 9, motor water pump 10, heating water pump 11, water-cooled condenser 12, battery cooler 13, multi-way valve 14 and connector 15 are connected through the connector 15, realizing high integration of the battery cooling circuit, the motor cooling circuit and the passenger compartment circuit, reducing the assembly parts, and thus meeting the lightweight requirements of new energy vehicles.

[0054] In addition, the flow of coolant and refrigerant is controlled by the connector 15 and the multi-way valve 14, and the coolant circuit and the refrigerant circuit are realized at the same time, which can meet the thermal management of the power battery 1, the thermal management of the motor 2 and / or the thermal management of the passenger compartment, and meet the multi-scenario requirements of thermal management.

[0055] In some designs, in order to control the flow of the coolant and the refrigerant, the multi-way valve 14 is a first three-way valve 14 and the connector 15 is a nine-way valve 30 .

[0056] Specifically, as shown in FIG. 2 , the multi-way valve 14 is a first three-way valve 14 , and the connector 15 is a nine-way valve 30 .

[0057] The first end 1 of the nine-way valve 30 is connected to the inlet of the motor water pump 10, the second end 2 of the nine-way valve 30 is connected to the inlet of the battery water pump 9, the third end 3 of the nine-way valve 30 is connected to the coolant inlet of the battery cooler 13, the fourth end 4 of the nine-way valve 30 is connected to the coolant outlet of the battery cooler 13, the fifth end 5 of the nine-way valve 30 is connected to the inlet of the radiator of the motor 2, the sixth end 6 of the nine-way valve 30 is respectively connected to the outlet of the low-temperature radiator 7 and the outlet of the heater core 4, the seventh end 7 of the nine-way valve 30 is connected to the coolant inlet of the water-cooled condenser 12, the eighth end 8 of the nine-way valve 30 is connected to the outlet of the battery, and the ninth end 9 of the nine-way valve 30 is connected to the inlet of the motor 2.

[0058] A first end 1 of the first three-way valve 14 is connected to the outlet of the heater 8, a second end 2 of the first three-way valve 14 is connected to the inlet of the low-temperature radiator 7, and a third end 3 of the first three-way valve 14 is connected to the inlet of the heater core 4. As can be appreciated, the first three-way valve 14 and a nine-way valve 30 are used to control the flow of coolant and refrigerant, thereby achieving thermal management of the entire vehicle.

[0059] In FIG. 2 , the system further includes a fan 16 , a temperature sensor 17 , a temperature and pressure sensor 18 , a liquid storage and drying bottle 19 , an expansion valve 21 and a water reservoir 22 .

[0060] Specifically, as shown in Figure 2, a fan 16 is configured at positions corresponding to the low-temperature radiator 7 and the motor radiator 6. A temperature sensor 17 is configured at the inlet of the motor 2, and a temperature sensor 17 is configured at the inlet of the power battery 1. The inlet of the compressor 3 and the outlet of the evaporator core 5 are respectively configured with temperature and pressure sensors 18. The refrigerant outlet of the water-cooled condenser 12 is connected to a liquid storage and drying bottle 19. The inlet of the evaporator core 5 and the inlet of the battery cooler 13 are both equipped with expansion valves 21. The two ends of the water reservoir 22 are respectively connected to the motor water pump 10 and the motor radiator 6.

[0061] FIG. 2 shows two motors as an example, but in actual applications there may be more or fewer motors.

[0062] In some embodiments, the heater 8 may be a PTC heater.

[0063] In another case, the multi-way valve 14 may be a four-way valve.

[0064] In some designs, the thermal management system 100 has a first operating mode, a second operating mode, a third operating mode, a fourth operating mode, and a fifth operating mode.

[0065] In the first working mode, the first end 1 of the nine-way valve 30 is connected to the fifth end 5 of the nine-way valve 30, the second end 2 of the nine-way valve 30 is connected to the fourth end 4 of the nine-way valve 30, the third end 3 of the nine-way valve 30 is connected to the eighth end 8 of the nine-way valve 30, the sixth end 6 of the nine-way valve 30 is connected to the seventh end 7 of the nine-way valve 30, the ninth end 9 of the nine-way valve 30 is closed, the first end 1 of the first three-way valve 14 and the second end 2 of the first three-way valve 14 are both open, and the third end 3 of the first three-way valve 14 is closed.

[0066] In the first operating mode, the battery water pump 9 is activated, and the coolant flows through the power battery 1 under the action of the battery water pump 9, then flows through the eighth end 8 and the third end 3 of the nine-way valve 30 to the battery cooler 13. The coolant further exchanges heat with the refrigerant flowing through the battery cooler 13. Subsequently, the cooled coolant flows back to the battery water pump 9 through the fourth end 4 and the second end 2 of the nine-way valve 30.

[0067] In the first working mode, the motor water pump 10 is started, and the coolant flows through the radiator of the motor 2 through the first end 1 of the nine-way valve 30 and the fifth end 5 of the nine-way valve 30 under the action of the motor water pump 10. The coolant exchanges heat with the outside air in the radiator of the motor 2. The cooled coolant then enters the motor 2 to cool the motor 2 and flows back to the motor water pump 10.

[0068] In the first working mode, the heating water pump 11 is started, and under the action of the heating water pump 11, the coolant flows through the first three-way valve into the low-temperature radiator 7 to exchange heat with the outside air. The cooled coolant flows through the sixth end 6 of the nine-way valve 30 and the seventh end 7 of the nine-way valve 30 through the water-cooled condenser 12 to exchange heat with the refrigerant flowing through the water-cooled condenser 12. The heated coolant enters the low-temperature radiator 7 again through the heating water pump 11.

[0069] In the first operating mode, compressor 3 is started, and the refrigerant enters the water-cooled condenser 12 under the action of compressor 3, exchanging heat with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant then enters the evaporator core 5 and the battery cooler 13. In the evaporator core 5, the cooled refrigerant exchanges heat with the hot air in the passenger compartment, cooling the passenger compartment. In the battery cooler 13, the cooled refrigerant exchanges heat with the coolant flowing through the battery cooler 13, cooling the batteries. The refrigerant flowing through the evaporator core 5 and the battery cooler 13 then enters the water-cooled condenser 12 through compressor 3.

[0070] In the second working mode, the first end 1 of the nine-way valve 30 is connected to the third end 3 of the nine-way valve 30, the second end 2 of the nine-way valve 30 is connected to the fourth end 4 of the nine-way valve 30, the fifth end 5 of the nine-way valve 30 is connected to the eighth end 8 of the nine-way valve 30, the sixth end 6 of the nine-way valve 30 is connected to the seventh end 7 of the nine-way valve 30, the ninth end 9 of the nine-way valve 30 is open, and the first end 1 of the first three-way valve 14, the second end 2 of the first three-way valve 14 and the third end 3 of the first three-way valve 14 are all open.

[0071] In some embodiments, the opening ratio of the ninth end 9 of the nine-way valve 30 is within a first preset range.

[0072] Exemplarily, the first preset interval is 30%-50%.

[0073] For example, the opening ratio of the ninth section of the nine-way valve 30 is 36%.

[0074] In the second operating mode, both the battery water pump 9 and the motor water pump 10 are activated. Under the action of the battery water pump 9, the coolant flows through the power battery 1, then passes through the eighth end 8 and the fifth end 5 of the nine-way valve 30, and then flows through the radiator of the motor 2 to exchange heat with the external air. After cooling, the coolant then flows through the motor 2 and enters the motor water pump 10. After the coolant is driven by the motor water pump 10, it flows through the first end 1 and the third end 3 of the nine-way valve 30 to the battery cooler 13. In the battery cooler 13, the coolant exchanges heat with the refrigerant flowing through the battery cooler 13, and then enters the power battery 1 under the action of the battery water pump 9.

[0075] In the second operating mode, the passage from the first three-way valve to the low-temperature radiator 7 is open, and the passage from the first three-way valve to the heater core 4 is open. The heating water pump 11 is started, and under the action of the heating water pump 11, the coolant flows through the first three-way valve and enters the low-temperature radiator 7 and the heater core 4 respectively. The coolant exchanges heat with the outside air in the low-temperature radiator 7, and the coolant exchanges heat with the passenger compartment air in the heater core 4, thereby heating the passenger compartment. The cooled coolant flows through the sixth end 6 of the nine-way valve 30 and the seventh end 7 of the nine-way valve 30, and then exchanges heat with the refrigerant flowing through the water-cooled condenser 12 through the water-cooled condenser 12. The heated coolant then re-enters the low-temperature radiator 7 through the heating water pump 11.

[0076] In the second working mode, the compressor 3 is started, and the refrigerant enters the water-cooled condenser 12 under the action of the compressor 3 and exchanges heat with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant enters the evaporator core 5 and the battery cooler 13. In the evaporator core 5, the cooled refrigerant exchanges heat with the hot air in the passenger compartment to achieve passenger compartment cooling. In the battery cooler 13, the cooled refrigerant exchanges heat with the coolant flowing through the battery circuit of the battery cooler 13 to achieve battery cooling. The refrigerant flowing through the evaporator core 5 and the battery cooler 13 then enters the water-cooled condenser 12 through the compressor 3.

[0077] In some embodiments, the cooled refrigerant enters the liquid storage drying bottle for drying, and then enters the evaporator core 5 and the battery cooler 13 after being throttled and cooled by the throttling device.

[0078] Exemplarily, the throttling device is an expansion valve.

[0079] In the third working mode, the first end 1 of the nine-way valve 30 is connected to the third end 3 of the nine-way valve 30, the second end 2 of the nine-way valve 30 is connected to the sixth end 6 of the nine-way valve 30, the fourth end 4 of the nine-way valve 30 is connected to the ninth end 9 of the nine-way valve 30, the eighth end 8 of the nine-way valve 30 is connected to the seventh end 7 of the nine-way valve 30, the fifth end 5 of the nine-way valve 30 is closed, the first end 1 of the first three-way valve 14 and the third end 3 of the first three-way valve 14 are both open, and the second end 2 of the first three-way valve 14 is closed.

[0080] In the third operating mode, the channel from the first three-way valve to the low-temperature radiator 7 is closed, and the channel from the first three-way valve to the heater core 4 is opened. Both the battery water pump 9 and the heating water pump 11 are activated. Under the action of the battery water pump 9, the coolant flows through the power battery 1 and then through the eighth end 8 and seventh end 7 of the nine-way valve 30 to the water-cooled condenser 12. In the water-cooled condenser 12, heat is exchanged with the refrigerant flowing through the water-cooled condenser 12. The heated coolant then flows through the heating water pump 11 into the heater 8, where it is further heated. After further heating, the coolant then flows through the first three-way valve into the heater core 4, where it undergoes heat exchange with the passenger compartment air. After cooling, the coolant then flows through the battery water pump 9 into the power battery 1.

[0081] In the third working mode, the motor water pump 10 is started, and the coolant flows through the battery cooler 13 through the first end 1 of the nine-way valve 30 and the third end 3 of the nine-way valve 30 under the action of the motor water pump 10. The coolant exchanges heat with the refrigerant flowing through the battery cooler 13 in the battery cooler 13, and the cooled coolant flows through the motor 2 and then enters the motor water pump 10.

[0082] In the third working mode, the compressor 3 is started, and the refrigerant enters the water-cooled condenser 12 under the action of the compressor 3 and performs heat exchange with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant enters the battery cooler 13. In the battery cooler 13, the cooled refrigerant performs heat exchange with the coolant flowing through the battery cooler 13 to achieve battery cooling. The refrigerant flowing through the battery cooler 13 then enters the water-cooled condenser 12 through the compressor 3.

[0083] In some embodiments, the cooled refrigerant enters the liquid storage drying bottle for drying, and then enters the battery cooler 13 after being throttled and cooled by a throttling device.

[0084] In the fourth working mode, the first end 1 of the nine-way valve 30 is connected to the third end 3 of the nine-way valve 30, the second end 2 of the nine-way valve 30 is connected to the eighth end 8 of the nine-way valve 30, the fifth end 5 of the nine-way valve 30 is connected to the fourth end 4 of the nine-way valve 30, the sixth end 6 of the nine-way valve 30 is connected to the seventh end 7 of the nine-way valve 30, the ninth end 9 of the nine-way valve 30 is open, and the first end 1 of the first three-way valve 14, the second end 2 of the first three-way valve 14 and the third end 3 of the first three-way valve 14 are all open.

[0085] In some embodiments, the opening ratio of the ninth end 9 of the nine-way valve 30 is within a second preset range.

[0086] Exemplarily, the second preset interval is 30%-50%.

[0087] For example, the opening ratio of the ninth section of the nine-way valve 30 is 36%.

[0088] In the fourth working mode, the battery water pump 9 is started, and the coolant flows through the power battery 1 under the action of the battery water pump 9 and then passes through the nine-way valve 30 into the battery water pump 9.

[0089] In the fourth operating mode, the motor water pump 10 is started, and the coolant, under the action of the motor water pump 10, flows through the first end 1 and the third end 3 of the nine-way valve 30 and into the battery cooler 13. In the battery cooler 13, the coolant exchanges heat with the refrigerant flowing through the battery cooler 13. The cooled coolant then enters the radiator of the motor 2 through the fourth end 4 and the fifth end 5 of the nine-way valve 30. There, it exchanges heat with the ambient air and, after further cooling, enters the motor 2. The flow rate of the coolant flowing through the radiator of the motor 2 can be adjusted according to actual conditions.

[0090] In the fourth working mode, the heating water pump 11 is started, the channel from the three-way valve to the low-temperature radiator 7 is opened, and the channel from the three-way valve to the heater core 4 is opened. Under the action of the heating water pump 11, the coolant enters the low-temperature radiator 7 and the heater core 4 respectively through the three-way valve. The coolant enters the low-temperature radiator 7 to exchange heat with the outside air, and the coolant enters the heater core 4 to exchange heat with the air in the passenger compartment. The cooled coolant passes through the sixth end 6 of the nine-way valve 30 and the seventh end 7 of the nine-way valve 30 and then flows through the water-cooled condenser 12 to exchange heat with the refrigerant flowing through the water-cooled condenser 12. The heated coolant enters the heating water pump 11 again.

[0091] In the fourth working mode, the compressor 3 is started, and the refrigerant enters the water-cooled condenser 12 under the action of the compressor 3 and performs heat exchange with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant enters the evaporator core 5 and the battery cooler 13. In the evaporator core 5, the cooled refrigerant absorbs water vapor in the surrounding air to dry it, thereby realizing the dehumidification function of the passenger compartment. In the battery cooler 13, the cooled refrigerant performs heat exchange with the coolant flowing through the battery circuit of the battery cooler 13, thereby realizing battery cooling. The refrigerant flowing through the evaporator core 5 and the battery cooler 13 then enters the water-cooled condenser 12 through the compressor 3.

[0092] In some implementations, the cooled refrigerant enters the liquid storage drying bottle for drying, and then passes through the throttling device to be throttled and cooled before entering the evaporator core 5 and the battery cooler 13 .

[0093] In the fifth working mode, the first end 1 of the nine-way valve 30 is connected to the second end 2 of the nine-way valve 30, the fourth end 4 of the nine-way valve 30 is connected to the seventh end 7 of the nine-way valve 30, the fifth end 5 of the nine-way valve 30 is connected to the sixth end 6 of the nine-way valve 30, the third end 3 of the nine-way valve 30 is connected to the eighth end 8 of the nine-way valve 30, the fifth end 5 of the nine-way valve 30 is closed, and the first end 1 of the first three-way valve 14, the second end 2 of the first three-way valve 14 and the third end 3 of the first three-way valve 14 are all open.

[0094] In the fifth working mode, the power battery 1, motor 2, heater core 4, motor 2 radiator, low-temperature radiator 7, three-way valve, battery water pump 9, motor water pump 10, heating water pump 11, water-cooled condenser 12, battery cooler 13, nine-way valve 30, and heater 8 are connected in series through water pipes, and the battery water pump 9, motor water pump 10 and heating water pump 11 are started.

[0095] It can be understood that in order to meet the different thermal management needs of the vehicle, the thermal management system 100 in the embodiment of the present application has five working modes: a first working mode, a second working mode, a third working mode, a fourth working mode and a fifth working mode, so as to meet the thermal management needs of the vehicle in different scenarios.

[0096] In one design, in order to control the flow of coolant and refrigerant, as shown in FIG3 , the multi-way valve 14 is a first three-way valve, and the connector 15 includes a first four-way valve 40 , a second four-way valve 41 , a third four-way valve 42 and a second three-way valve 43 .

[0097] The first end 1 of the first four-way valve 40 is connected to the inlet of the battery water pump 9, the second end 2 of the first four-way valve 40 is connected to the second end 2 of the second four-way valve 41, the third end 3 of the first four-way valve 40 is connected to the coolant inlet of the battery cooler 13, and the fourth end 4 of the first four-way valve 40 is connected to the outlet of the motor water pump 10.

[0098] The first end 1 of the second four-way valve 41 is connected to the coolant outlet of the battery cooler 13 , the third end 3 of the second four-way valve 41 is connected to the first end 1 of the third four-way valve 42 , and the fourth end 4 of the second four-way valve 41 is connected to the first end 1 of the second three-way valve 43 .

[0099] The second end 2 of the third four-way valve 42 is connected to the outlet of the power battery 1, the third end 3 of the third four-way valve 42 is connected to the inlet of the heating water pump 11, and the fourth end 4 of the third four-way valve 42 is connected to the outlet of the low-temperature radiator 7 and the heater core 4 respectively.

[0100] The outlet of compressor 3 is connected to the inlet of water-cooled condenser 12, and the outlet of water-cooled condenser 12 is connected to the inlet of evaporator core 5 and the refrigerant inlet of battery cooler 13, respectively. The outlet of evaporator core 5 is connected to compressor 3. The refrigerant outlet of battery cooler 13 is connected to the inlet of compressor 3.

[0101] In FIG3 , the system further includes a fan 16 , a temperature sensor 17 , a temperature and pressure sensor 18 , a liquid storage and drying bottle 19 , an expansion valve 21 and a water reservoir 22 .

[0102] Specifically, as shown in Figure 3, a fan 16 is configured at positions corresponding to the low-temperature radiator 7 and the motor radiator 6. A temperature sensor 17 is configured at the inlet of the motor 2, and a temperature sensor 17 is configured at the inlet of the power battery 1. The inlet of the compressor 3 and the outlet of the evaporator core 5 are respectively configured with temperature and pressure sensors 18. The refrigerant outlet of the water-cooled condenser 12 is connected to a liquid storage and drying bottle 19. The inlet of the evaporator core 5 and the inlet of the battery cooler 13 are both equipped with expansion valves 21. The two ends of the water reservoir 22 are respectively connected to the motor water pump 10 and the motor radiator 6.

[0103] FIG. 2 shows two motors as an example, but in actual applications there may be more or fewer motors.

[0104] The second end 2 of the second three-way valve 43 is connected to the inlet of the radiator of the motor 2 , and the third end 3 of the second three-way valve 43 is connected to the inlet of the radiator of the motor 2 .

[0105] When the multi-way valve 14 is a first three-way valve and the connector 15 includes a first four-way valve 40, a second four-way valve 41, a third four-way valve 42 and a second three-way valve 43, the thermal management system 100 has a sixth operating mode, a seventh operating mode, an eighth operating mode, a ninth operating mode and a tenth operating mode.

[0106] In the sixth operating mode, the first end 1 of the first three-way valve 14 and the second end 2 of the first three-way valve 14 are both open, and the third end 3 of the first three-way valve 14 is closed. The first end 1 of the first four-way valve 40 is in communication with the third end 3 of the first four-way valve 40, and the second end 2 of the first four-way valve 40 is in communication with the fourth end 4 of the first four-way valve 40. The first end 1 of the second four-way valve 41 is in communication with the third end 3 of the second four-way valve 41, and the first end 1 of the second four-way valve 41 is in communication with the third end 3 of the second four-way valve 41. The first end 1 of the third four-way valve 42 is in communication with the second end 2 of the first four-way valve 40, and the third end 3 of the third four-way valve 42 is in communication with the fourth end 4 of the third four-way valve 42.

[0107] In the sixth operating mode, the battery water pump 9 is activated. Under the action of the battery water pump 9, the coolant flows through the power battery 1 and then through the second end 2 of the third four-way valve 42, the second end 2 of the third four-way valve 42, the third end 3 of the second four-way valve 41, and the first end 1 of the second four-way valve 41, to the battery cooler 13. Furthermore, the coolant exchanges heat with the refrigerant flowing through the battery cooler 13. Subsequently, the cooled coolant flows back to the battery water pump 9 through the third end 3 of the first four-way valve 40 and the first end 1 of the first four-way valve 40.

[0108] In the sixth working mode, the motor water pump 10 is started, and under the action of the motor water pump 10, the coolant flows through the radiator of the motor 2 through the fourth end 4 of the first four-way valve 40, the second end 2 of the first four-way valve 40, the second end 2 of the second four-way valve 41, the fourth end 4 of the second four-way valve 41, the first end 1 of the second three-way valve 43, and the third end 3 of the second three-way valve 43. The coolant exchanges heat with the outside air in the radiator of the motor 2, and the cooled coolant enters the motor 2 again to cool the motor 2, and flows back to the motor water pump 10.

[0109] In the sixth operating mode, the heating water pump 11 is started. Under the action of the heating water pump 11, the coolant flows through the first three-way valve into the low-temperature radiator 7 to exchange heat with the outside air. The cooled coolant flows through the fourth end 4 of the third four-way valve 42 and the third end 3 of the third four-way valve 42 to the heating water pump 11. Subsequently, it enters the low-temperature radiator 7 again through the heating water pump 11.

[0110] In the sixth operating mode, compressor 3 is activated. The refrigerant enters the water-cooled condenser 12 under the action of compressor 3 and exchanges heat with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant then enters the evaporator core 5 and the battery cooler 13, respectively. In the evaporator core 5, the cooled refrigerant exchanges heat with the hot air in the passenger compartment, cooling the passenger compartment. In the battery cooler 13, the cooled refrigerant exchanges heat with the coolant flowing through the battery cooler 13, cooling the batteries. The refrigerant flowing through the evaporator core 5 and the battery cooler 13 then enters the water-cooled condenser 12 through compressor 3.

[0111] In the seventh working mode, the first end 1 of the first three-way valve 14 , the second end 2 of the first three-way valve 14 , and the third end 3 of the first three-way valve 14 are all open.

[0112] In the seventh operating mode, both the battery water pump 9 and the motor water pump 10 are activated. Coolant, driven by the battery water pump 9, flows through the power battery 1 and then through the second end 2 of the third four-way valve 42, the first end 1 of the third four-way valve 42, the third end 3 of the second four-way valve 41, the fourth end 4 of the second four-way valve 41, the first end 1 of the second three-way valve 43, and the third end 3 of the second three-way valve 43. The coolant then exchanges heat with the outside air through the radiator of the motor 2. After cooling, the coolant then flows through the motor 2 and into the motor water pump 10. After being driven by the motor water pump 10, the coolant flows through the fourth end 4 of the first four-way valve 40 and the third end 3 of the first four-way valve 40 to the battery cooler 13. There, the coolant exchanges heat with the refrigerant flowing through the battery cooler 13 before flowing through the first end 1 of the second four-way valve 41 and the second end 2 of the second four-way valve 41 to the battery water pump 9.

[0113] In the seventh operating mode, the passage from the first three-way valve to the low-temperature radiator 7 is open, and the passage from the first three-way valve to the heater core 4 is open. Heating water pump 11 is activated, and under the action of heating water pump 11, coolant flows through the first three-way valve into the low-temperature radiator 7 and heater core 4, respectively. The coolant exchanges heat with the outside air in the low-temperature radiator 7, and with the passenger compartment air in the heater core 4, heating the passenger compartment. The cooled coolant then flows through fourth end 4 of third four-way valve 42 and third end 3 of third four-way valve 42 to the heating water pump 11.

[0114] In the seventh operating mode, compressor 3 is activated. The refrigerant enters the water-cooled condenser 12 under the action of compressor 3 and exchanges heat with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant then enters the evaporator core 5 and the battery cooler 13, respectively. In the evaporator core 5, the cooled refrigerant exchanges heat with the hot air in the passenger compartment, cooling the passenger compartment. In the battery cooler 13, the cooled refrigerant exchanges heat with the coolant flowing through the battery cooler 13, cooling the batteries. The refrigerant flowing through the evaporator core 5 and the battery cooler 13 then enters the water-cooled condenser 12 through compressor 3.

[0115] In the eighth working mode, the first end 1 of the first three-way valve 14 and the third end 3 of the first three-way valve 14 are both open, and the second end 2 of the first three-way valve 14 is closed.

[0116] In the eighth operating mode, the passage from the first three-way valve to the low-temperature radiator 7 is closed, and the passage from the first three-way valve to the heater core 4 is open. Both the battery water pump 9 and the heating water pump 11 are activated. Driven by the battery water pump 9, the coolant flows through the power battery 1 and then through the water-cooled condenser 12, where it undergoes heat exchange with the refrigerant flowing through the water-cooled condenser 12. The heated coolant then flows through the heating water pump 11 to the heater 8, where it is further heated. After further heating, the coolant then flows through the first three-way valve and into the heater core 4, where it undergoes heat exchange with the passenger compartment air. After cooling, the coolant then flows through the battery water pump 9 into the power battery 1.

[0117] In the eighth working mode, the motor water pump 10 is started, and the coolant flows through the battery cooler 13 under the action of the motor water pump 10. The coolant exchanges heat with the refrigerant flowing through the battery cooler 13 in the battery cooler 13, and the cooled coolant flows through the motor 2 and enters the motor water pump 10.

[0118] In the eighth working mode, the compressor 3 is started, and the refrigerant enters the water-cooled condenser 12 under the action of the compressor 3 and performs heat exchange with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant enters the battery cooler 13. In the battery cooler 13, the cooled refrigerant performs heat exchange with the coolant flowing through the battery cooler 13 to achieve battery cooling. The refrigerant flowing through the battery cooler 13 then enters the water-cooled condenser 12 through the compressor 3.

[0119] In some embodiments, the cooled refrigerant enters the liquid storage drying bottle for drying, and then enters the battery cooler 13 after being throttled and cooled by a throttling device.

[0120] In the ninth working mode, the first end 1 of the first three-way valve 14 , the second end 2 of the first three-way valve 14 , and the third end 3 of the first three-way valve 14 are all open.

[0121] In the ninth working mode, the battery water pump 9 is started, and the coolant flows through the power battery 1 and into the battery water pump 9 under the action of the battery water pump 9 .

[0122] In the ninth operating mode, the motor water pump 10 is started, and the coolant flows through the battery cooler 13 under the action of the motor water pump 10. The coolant exchanges heat with the refrigerant flowing through the battery cooler 13 in the battery cooler 13. The cooled coolant enters the radiator of the motor 2, where it exchanges heat with the ambient air. The further cooled coolant enters the motor 2. The flow rate of the coolant flowing through the radiator of the motor 2 can be adjusted according to actual conditions.

[0123] In the ninth working mode, the heating water pump 11 is started, the channel from the first three-way valve to the low-temperature radiator 7 is opened, and the channel from the three-way valve to the heater core 4 is opened. Under the action of the heating water pump 11, the coolant enters the low-temperature radiator 7 and the heater core 4 respectively through the first three-way valve. The coolant enters the low-temperature radiator 7 to exchange heat with the outside air, and the coolant enters the heater core 4 to exchange heat with the air in the passenger compartment. The cooled coolant flows through the water-cooled condenser 12 to exchange heat with the refrigerant flowing through the water-cooled condenser 12, and the heated coolant enters the heating water pump 11 again.

[0124] In the ninth working mode, the compressor 3 is started, and the refrigerant enters the water-cooled condenser 12 under the action of the compressor 3 and performs heat exchange with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant enters the evaporator core 5 and the battery cooler 13. In the evaporator core 5, the cooled refrigerant absorbs water vapor in the surrounding air to dry it, thereby realizing the dehumidification function of the passenger compartment. In the battery cooler 13, the cooled refrigerant performs heat exchange with the coolant flowing through the battery circuit of the battery cooler 13, thereby realizing battery cooling. The refrigerant flowing through the evaporator core 5 and the battery cooler 13 then enters the water-cooled condenser 12 through the compressor 3.

[0125] In the tenth working mode, the first end 1 of the first three-way valve 14 , the second end 2 of the first three-way valve 14 , and the third end 3 of the first three-way valve 14 are all open.

[0126] In the tenth working mode, the power battery 1, motor 2, heater core 4, motor 2 radiator, low-temperature radiator 7, three-way valve, battery water pump 9, electric drive water pump, heating water pump 11, water-cooled condenser 12, battery cooler 13, nine-way valve 30, and heater 8 are connected in series through water pipes, and the battery water pump 9, motor water pump 10, and heating water pump 11 are started.

[0127] It can be understood that in order to meet the different thermal management requirements of the vehicle, the thermal management system 100 in the embodiment of the present application adopts a first four-way valve 40, a second four-way valve 41, a third four-way valve 42 and a second three-way valve 43 to achieve the sixth working mode, the seventh working mode, the eighth working mode, the ninth working mode and the tenth working mode, thereby being able to meet the thermal management requirements of the vehicle in different scenarios.

[0128] In one design, to meet the need for lightweighting of the vehicle, the thermal management system 100 in the embodiment of the present application further includes a flow channel plate, on which the battery water pump 9, the motor water pump 10, the heating water pump 11, the water-cooled condenser 12, the battery cooler 13, and the connector 15 are integrated.

[0129] In some embodiments, the connector 15 is the aforementioned nine-way valve 30. The connection relationship among the battery water pump 9, the motor water pump 10, the heating water pump 11, the water-cooled condenser 12, the battery cooler 13 and the nine-way valve 30 is the same as the connection method described above.

[0130] In some embodiments, connector 15 includes the first four-way valve 40, second four-way valve 41, third four-way valve 42, and second three-way valve 43. The battery water pump 9, motor water pump 10, heating water pump 11, water-cooled condenser 12, battery cooler 13, first four-way valve 40, second four-way valve 41, third four-way valve 42, and second three-way valve 43 are connected in the same manner as described above.

[0131] For example, as shown in FIG4 , a flow channel plate 20 - 1 has multiple flow channels 20 - 1 - 1 within it. The size of each flow channel is within a preset range. For example, the flow channel width is 20 mm to 30 mm, the height is 8 mm to 20 mm, and the flow channel wall thickness is 3 mm to 5 mm.

[0132] As shown in Figure 4 , the flow plate 20-1 includes an upper flow plate 20-1-2, a middle flow plate 20-1-3, and a lower flow plate 20-1-4. The flow plate 20-1 is made of a plastic material, containing more than 50% of at least one of polyamide (PA), polyphenylene sulfide (PPS), and polypropylene (PP). The flow plate 20-1 is first manufactured using an integrated thermoforming process, and then the upper, middle, and lower flow plates 20-1 are welded together using a hot melt welding process.

[0133] The flow channel plate 20 - 1 also includes a plurality of water pipe joints.

[0134] For example, as shown in Figure 5, the flow channel plate 20-1 includes eight water pipe joints: a first water pipe joint 20-1-5, a second water pipe joint 20-1-6, a third water pipe joint 20-1-7, a fourth water pipe joint 20-1-8, a fifth water pipe joint 20-1-9, a sixth water pipe joint 20-1-10, a seventh water pipe joint 20-1-11 and an eighth water pipe joint 20-1-12. The first water pipe joint 20-1-520-1-5 is connected to the outlet of the water tank, the second water pipe joint 20-1-620-1-6 is connected to the outlet of the motor 2, the third water pipe joint 20-1-720-1-7 is connected to the outlet of the radiator of the motor 2, the fourth water pipe joint 20-1-820-1-8 is connected to the inlet of the heater 8, the fifth water pipe joint 20-1-920-1-9 is connected to the outlet of the low-temperature radiator 7, the sixth water pipe joint 20-1-1020-1-10 is connected to the outlet of the power battery 1, the seventh water pipe joint 20-1-1120-1-11 is connected to the inlet of the power battery 1, and the eighth water pipe joint 20-1-1220-1-12 is connected to the inlet of the radiator of the motor 2.

[0135] In some embodiments, the water pipe connector can be made of plastic or metal. If the water pipe connector is made of plastic, it contains more than a predetermined percentage (e.g., 50%) of PP material. The water pipe connector is injection molded, has a quick-connect structure, and is sized, for example, VDA-NW16. The water pipe connector is hot-melt welded to the flow channel plate 20-1. As shown in FIG5 , the flow channel plate 20-1 also includes a mounting point 20-10, which is designed with a vibration damping structure 20-10-1.

[0136] For example, the outer diameter of the shock-absorbing structure may be 25 mm, and the height may be 22 mm; the outer diameter may be 26 mm, and the height may be 23 mm, which is not specifically limited in the embodiments of the present application.

[0137] FIG. 5 also exemplarily shows an integrated water-cooled condenser 12 , a battery cooler 13 , a heating water pump 11 , a battery water pump 9 , a motor water pump 10 and a nine-way valve 30 .

[0138] Exemplarily, as shown in FIG6 , the nine-way valve 30 includes a first end 1 , a second end 2 , a third end 3 , a fourth end 4 , a fifth end 5 , a sixth end 6 , a seventh end 7 , an eighth end 8 and a ninth end 9 .

[0139] When the flow channel plate 20 - 1 includes multiple water pipe joints, the connection relationship between the components of the thermal management system 100: the battery water pump 9, the motor water pump 10, the heating water pump 11, the water-cooled condenser 12, the battery cooler 13, the nine-way valve 30 and the flow channel plate 20 - 1 is as follows:

[0140] The refrigerant inlet of the water-cooled condenser 12 is connected to the outlet of the compressor 3, and the refrigerant outlet of the water-cooled condenser 12 is connected to the inlet of the liquid storage drying bottle. The coolant outlet of the water-cooled condenser 12 is connected to the inlet of the heater 8, and the coolant outlet of the water-cooled condenser 12 is connected to the inlet of the heating water pump 11.

[0141] The refrigerant outlet of the battery cooler 13 is connected to the inlet of the compressor 3 , and the refrigerant inlet of the battery cooler 13 is connected to the outlet of the liquid storage drying bottle. The coolant inlet of the battery cooler 13 is connected to the third end 3 of the nine-way valve 30 , and the coolant outlet of the battery cooler 13 is connected to the fourth end 4 of the nine-way valve 30 .

[0142] The battery water pump 9, motor water pump 10, and heating water pump 11 are each bolted to the flow plate 20-1, using either radial or end-face sealing. The outlet of the heating water pump 11 is connected to the inlet of the heater 8, and the coolant inlet of the water-cooled condenser 12 is connected to the seventh end 7 of the nine-way valve 30 through the internal channel of the flow plate 20-1. The outlet of the battery water pump 9 is connected to the coolant inlet of the power battery 1, and the inlet of the battery water pump 9 is connected to the second end 2 of the nine-way valve 30 through the internal channel of the flow plate 20-1. The inlet of the motor water pump 10 is connected to the coolant outlet of the motor 2, and the outlet of the motor water pump 10 is connected to the first end 1 of the nine-way valve 30 through the internal channel of the flow plate 20-1.

[0143] The first end 1 to the ninth end 9 of the nine-way valve 30 are respectively connected to the internal flow channel of the flow channel plate 20-1. The fifth end 5 and the ninth end 9 of the nine-way valve 30 share a valve. The valve opening ratio can be adjusted within a range of 0 to 100%. The outlet of the power battery 1 is connected to the eighth end 8 of the nine-way valve 30 through the internal channel of the flow channel plate 20-1. The outlet of the heater core 4 is connected to the sixth end 6 of the nine-way valve 30 through the internal channel of the flow channel plate 20-1. The outlet of the low-temperature radiator 7 is connected to the sixth end 6 of the nine-way valve 30 through the internal channel of the flow channel plate 20-1. The inlet of the motor 2 is connected to the ninth end 9 of the nine-way valve 30 through the internal channel of the flow channel plate 20-1. The inlet of the radiator of the motor 2 is connected to the fifth end 5 of the nine-way valve 30 through the internal channel of the flow channel plate 20-1.

[0144] In the first working mode, the first end 1 of the nine-way valve 30 is connected to the fifth end 5 of the nine-way valve 30, the second end 2 of the nine-way valve 30 is connected to the fourth end 4 of the nine-way valve 30, the third end 3 of the nine-way valve 30 is connected to the eighth end 8 of the nine-way valve 30, the sixth end 6 of the nine-way valve 30 is connected to the seventh end 7 of the nine-way valve 30, the ninth end 9 of the nine-way valve 30 is closed, the first end 1 of the three-way valve and the second end 2 of the three-way valve are both open, and the third end 3 of the three-way valve is closed.

[0145] The second water pipe joint 20-1-6 of the flow channel plate 20-1 is connected to the eighth water pipe joint 20-1-12 through an internal flow channel, the fourth water pipe joint 20-1-8 is connected to the fifth water pipe joint 20-1-9 through an internal flow channel, and the sixth water pipe joint 20-1-10 is connected to the seventh water pipe joint 20-1-11 through an internal flow channel.

[0146] In the first operating mode, the battery water pump 9 is activated, and the coolant flows through the power battery 1 under the action of the battery water pump 9, then flows through the eighth end 8 and the third end 3 of the nine-way valve 30 to the battery cooler 13. The coolant further exchanges heat with the refrigerant flowing through the battery cooler 13. Subsequently, the cooled coolant flows back to the battery water pump 9 through the fourth end 4 and the second end 2 of the nine-way valve 30.

[0147] In the first working mode, the motor water pump 10 is started, and the coolant flows through the radiator of the motor 2 through the first end 1 of the nine-way valve 30 and the fifth end 5 of the nine-way valve 30 under the action of the motor water pump 10. The coolant exchanges heat with the outside air in the radiator of the motor 2. The cooled coolant then enters the motor 2 to cool the motor 2 and flows back to the motor water pump 10.

[0148] In the first working mode, the heating water pump 11 is started, and under the action of the heating water pump 11, the coolant flows through the first three-way valve into the low-temperature radiator 7 to exchange heat with the outside air. The cooled coolant flows through the sixth end 6 of the nine-way valve 30 and the seventh end 7 of the nine-way valve 30 through the water-cooled condenser 12 to exchange heat with the refrigerant flowing through the water-cooled condenser 12. The heated coolant enters the low-temperature radiator 7 again through the heating water pump 11.

[0149] In the first operating mode, compressor 3 is started, and the refrigerant enters the water-cooled condenser 12 under the action of compressor 3, exchanging heat with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant then enters the evaporator core 5 and the battery cooler 13. In the evaporator core 5, the cooled refrigerant exchanges heat with the hot air in the passenger compartment, cooling the passenger compartment. In the battery cooler 13, the cooled refrigerant exchanges heat with the coolant flowing through the battery cooler 13, cooling the batteries. The refrigerant flowing through the evaporator core 5 and the battery cooler 13 then enters the water-cooled condenser 12 through compressor 3.

[0150] In the second working mode, the first end 1 of the nine-way valve 30 is connected to the third end 3 of the nine-way valve 30, the second end 2 of the nine-way valve 30 is connected to the fourth end 4 of the nine-way valve 30, the fifth end 5 of the nine-way valve 30 is connected to the eighth end 8 of the nine-way valve 30, the sixth end 6 of the nine-way valve 30 is connected to the seventh end 7 of the nine-way valve 30, the ninth end 9 of the nine-way valve 30 is open, and the first end 1 of the first three-way valve, the second end 2 of the first three-way valve and the third end 3 of the first three-way valve are all open.

[0151] In some embodiments, the opening ratio of the ninth end 9 of the nine-way valve 30 is within a first preset range.

[0152] Exemplarily, the first preset interval is 30%-50%.

[0153] For example, the opening ratio of the ninth section of the nine-way valve 30 is 36%.

[0154] The second water pipe joint 20-1-6 and the sixth water pipe joint 20-1-10 of the flow channel plate 20-1 are connected through the internal flow channel, the fourth water pipe joint 20-1-8 and the fifth water pipe joint 20-1-9 are connected through the internal flow channel, and the seventh water pipe joint 20-1-11 and the seventh water pipe joint 20-1-11 are connected through the internal flow channel.

[0155] In the second operating mode, both the battery water pump 9 and the motor water pump 10 are activated. Under the action of the battery water pump 9, the coolant flows through the power battery 1, then passes through the eighth end 8 and the fifth end 5 of the nine-way valve 30, and then flows through the radiator of the motor 2 to exchange heat with the external air. After cooling, the coolant then flows through the motor 2 and enters the motor water pump 10. After the coolant is driven by the motor water pump 10, it flows through the first end 1 and the third end 3 of the nine-way valve 30 to the battery cooler 13. In the battery cooler 13, the coolant exchanges heat with the refrigerant flowing through the battery cooler 13, and then enters the power battery 1 under the action of the battery water pump 9.

[0156] In the second operating mode, the passage from the first three-way valve to the low-temperature radiator 7 is open, and the passage from the first three-way valve to the heater core 4 is open. The heating water pump 11 is started, and under the action of the heating water pump 11, the coolant flows through the first three-way valve and enters the low-temperature radiator 7 and the heater core 4 respectively. The coolant exchanges heat with the outside air in the low-temperature radiator 7, and the coolant exchanges heat with the passenger compartment air in the heater core 4, thereby heating the passenger compartment. The cooled coolant flows through the sixth end 6 of the nine-way valve 30 and the seventh end 7 of the nine-way valve 30, and then exchanges heat with the refrigerant flowing through the water-cooled condenser 12 through the water-cooled condenser 12. The heated coolant then re-enters the low-temperature radiator 7 through the heating water pump 11.

[0157] In the second working mode, the compressor 3 is started, and the refrigerant enters the water-cooled condenser 12 under the action of the compressor 3 and exchanges heat with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant enters the evaporator core 5 and the battery cooler 13. In the evaporator core 5, the cooled refrigerant exchanges heat with the hot air in the passenger compartment to achieve passenger compartment cooling. In the battery cooler 13, the cooled refrigerant exchanges heat with the coolant flowing through the battery circuit of the battery cooler 13 to achieve battery cooling. The refrigerant flowing through the evaporator core 5 and the battery cooler 13 then enters the water-cooled condenser 12 through the compressor 3.

[0158] In some embodiments, the cooled refrigerant enters the liquid storage drying bottle for drying, and then enters the evaporator core 5 and the battery cooler 13 after being throttled and cooled by the throttling device.

[0159] Exemplarily, the throttling device is an expansion valve.

[0160] In the third working mode, the first end 1 of the nine-way valve 30 is connected to the third end 3 of the nine-way valve 30, the second end 2 of the nine-way valve 30 is connected to the sixth end 6 of the nine-way valve 30, the fourth end 4 of the nine-way valve 30 is connected to the ninth end 9 of the nine-way valve 30, the eighth end 8 of the nine-way valve 30 is connected to the seventh end 7 of the nine-way valve 30, the fifth end 5 of the nine-way valve 30 is closed, the first end 1 of the first three-way valve and the third end 3 of the first three-way valve are both open, and the second end 2 of the first three-way valve is closed.

[0161] The second water pipe joint 20-1-6 of the flow channel plate 20-1 is connected to the eighth water pipe joint 20-1-12 through an internal flow channel, the fourth water pipe joint 20-1-8 is connected to the seventh water pipe joint 20-1-11 through an internal flow channel, and the fifth water pipe joint 20-1-9 is connected to the sixth water pipe joint 20-1-10 through an internal flow channel.

[0162] In the third operating mode, the channel from the first three-way valve to the low-temperature radiator 7 is closed, and the channel from the first three-way valve to the heater core 4 is opened. Both the battery water pump 9 and the heating water pump 11 are activated. Under the action of the battery water pump 9, the coolant flows through the power battery 1 and then through the eighth end 8 and seventh end 7 of the nine-way valve 30 to the water-cooled condenser 12. In the water-cooled condenser 12, heat is exchanged with the refrigerant flowing through the water-cooled condenser 12. The heated coolant then flows through the heating water pump 11 into the heater 8, where it is further heated. After further heating, the coolant then flows through the first three-way valve into the heater core 4, where it undergoes heat exchange with the passenger compartment air. After cooling, the coolant then flows through the battery water pump 9 into the power battery 1.

[0163] In the third working mode, the motor water pump 10 is started, and the coolant flows through the battery cooler 13 through the first end 1 of the nine-way valve 30 and the third end 3 of the nine-way valve 30 under the action of the motor water pump 10. The coolant exchanges heat with the refrigerant flowing through the battery cooler 13 in the battery cooler 13, and the cooled coolant flows through the motor 2 and then enters the motor water pump 10.

[0164] In the third working mode, the compressor 3 is started, and the refrigerant enters the water-cooled condenser 12 under the action of the compressor 3 and performs heat exchange with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant enters the battery cooler 13. In the battery cooler 13, the cooled refrigerant performs heat exchange with the coolant flowing through the battery cooler 13 to achieve battery cooling. The refrigerant flowing through the battery cooler 13 then enters the water-cooled condenser 12 through the compressor 3.

[0165] In some embodiments, the cooled refrigerant enters the liquid storage drying bottle for drying, and then enters the battery cooler 13 after being throttled and cooled by a throttling device.

[0166] In the fourth working mode, the first end 1 of the nine-way valve 30 is connected to the third end 3 of the nine-way valve 30, the second end 2 of the nine-way valve 30 is connected to the eighth end 8 of the nine-way valve 30, the fifth end 5 of the nine-way valve 30 is connected to the fourth end 4 of the nine-way valve 30, the sixth end 6 of the nine-way valve 30 is connected to the seventh end 7 of the nine-way valve 30, the ninth end 9 of the nine-way valve 30 is open, and the first end 1 of the three-way valve, the second end 2 of the three-way valve and the third end 3 of the three-way valve are all open.

[0167] In some embodiments, the opening ratio of the ninth end 9 of the nine-way valve 30 is within a second preset range.

[0168] Exemplarily, the second preset interval is 30%-50%.

[0169] For example, the opening ratio of the ninth section of the nine-way valve 30 is 36%.

[0170] The second water pipe joint 20-1-6 and the eighth water pipe joint 20-1-12 of the flow channel plate 20-1 are connected through the internal flow channel, the fourth water pipe joint 20-1-8 and the fifth water pipe joint 20-1-9 are connected through the internal flow channel, and the seventh water pipe joint 20-1-11 and the sixth water pipe joint 20-1-10 are connected through the internal flow channel.

[0171] In the fourth working mode, the battery water pump 9 is started, and the coolant flows through the power battery 1 under the action of the battery water pump 9 and then passes through the nine-way valve 30 into the battery water pump 9.

[0172] In the fourth operating mode, the motor water pump 10 is started, and the coolant, under the action of the motor water pump 10, flows through the first end 1 and the third end 3 of the nine-way valve 30 and into the battery cooler 13. In the battery cooler 13, the coolant exchanges heat with the refrigerant flowing through the battery cooler 13. The cooled coolant then enters the radiator of the motor 2 through the fourth end 4 and the fifth end 5 of the nine-way valve 30. There, it exchanges heat with the ambient air and, after further cooling, enters the motor 2. The flow rate of the coolant flowing through the radiator of the motor 2 can be adjusted according to actual conditions.

[0173] In the fourth working mode, the heating water pump 11 is started, the channel from the three-way valve to the low-temperature radiator 7 is opened, and the channel from the three-way valve to the heater core 4 is opened. Under the action of the heating water pump 11, the coolant enters the low-temperature radiator 7 and the heater core 4 respectively through the three-way valve. The coolant enters the low-temperature radiator 7 to exchange heat with the outside air, and the coolant enters the heater core 4 to exchange heat with the air in the passenger compartment. The cooled coolant passes through the sixth end 6 of the nine-way valve 30 and the seventh end 7 of the nine-way valve 30, and then flows through the water-cooled condenser 12 to exchange heat with the refrigerant flowing through the water-cooled condenser 12. The heated coolant enters the heating water pump 11 again.

[0174] In the fourth working mode, the compressor 3 is started, and the refrigerant enters the water-cooled condenser 12 under the action of the compressor 3 and performs heat exchange with the coolant flowing through the water-cooled condenser 12. The cooled refrigerant enters the evaporator core 5 and the battery cooler 13. In the evaporator core 5, the cooled refrigerant absorbs water vapor in the surrounding air to dry it, thereby realizing the dehumidification function of the passenger compartment. In the battery cooler 13, the cooled refrigerant performs heat exchange with the coolant flowing through the battery circuit of the battery cooler 13, thereby realizing battery cooling. The refrigerant flowing through the evaporator core 5 and the battery cooler 13 then enters the water-cooled condenser 12 through the compressor 3.

[0175] In some implementations, the cooled refrigerant enters the liquid storage drying bottle for drying, and then passes through the throttling device to be throttled and cooled before entering the evaporator core 5 and the battery cooler 13 .

[0176] In the fifth working mode, the first end 1 of the nine-way valve 30 is connected to the second end 2 of the nine-way valve 30, the fourth end 4 of the nine-way valve 30 is connected to the seventh end 7 of the nine-way valve 30, the fifth end 5 of the nine-way valve 30 is connected to the sixth end 6 of the nine-way valve 30, the third end 3 of the nine-way valve 30 is connected to the eighth end 8 of the nine-way valve 30, the fifth end 5 of the nine-way valve 30 is closed, and the first end 1 of the three-way valve, the second end 2 of the three-way valve and the third end 3 of the three-way valve are all open.

[0177] The second water pipe joint 20-1-6 of the flow channel plate 20-1 is connected to the sixth water pipe joint 20-1-10 through an internal flow channel, the fourth water pipe joint 20-1-8 is connected to the seventh water pipe joint 20-1-11 through an internal flow channel, and the fifth water pipe joint 20-1-9 is connected to the eighth water pipe joint 20-1-12 through an internal flow channel.

[0178] In the fifth working mode, the power battery 1, motor 2, heater core 4, motor 2 radiator, low-temperature radiator 7, three-way valve, battery water pump 9, motor water pump 10, heating water pump 11, water-cooled condenser 12, battery cooler 13, nine-way valve 30, and heater 8 are connected in series through water pipes, and the battery water pump 9, motor water pump 10 and heating water pump 11 are started.

[0179] It can be understood that in order to meet the different thermal management needs of the vehicle, the thermal management system 100 in the embodiment of the present application has five working modes: a first working mode, a second working mode, a third working mode, a fourth working mode and a fifth working mode, so as to meet the thermal management needs of the vehicle in different scenarios.

[0180] As can be appreciated, the integrated arrangement of the battery water pump 9, motor water pump 10, heating water pump 11, water-cooled condenser 12, battery cooler 13, and connector 15 on the flow channel plate 20-1 reduces the number of mounting bracket components and meets the requirements for vehicle lightweighting. Furthermore, the use of flow channel plate 20-1 reduces the number of seals required for water pipes and water pipe joints, reducing cabin space and making the vehicle more reliable. Furthermore, while the thermal management system 100 is highly integrated, requiring a long assembly time, the water pipe joints utilize a quick-connect structure for simplified assembly.

[0181] In some designs, in order to protect the thermal management system 100 , the thermal management system 100 further includes a liquid storage and drying bottle, the inlet of which is connected to the refrigerant outlet of the water-cooled cooler, and the outlet of which is connected to the inlet of the evaporator core 5 .

[0182] It can be understood that the receiver-drier absorbs moisture in the sealed air-conditioning pipeline and filters tiny impurities in the pipeline, thereby protecting the thermal management system 100.

[0183] In some designs, in order to replenish the coolant in time, the thermal management system 100 further includes a water storage bottle, the outlets of which are connected to the motor 2 and the motor water pump 10 respectively.

[0184] It is understandable that the coolant is replenished into the thermal management system 100 in a timely manner through the water storage bottle to ensure the stable operation of the thermal management system 100.

[0185] In one design, the thermal management system 100 further includes at least one fan, which is provided at positions corresponding to the low-temperature radiator 7 and the radiator of the motor 2 .

[0186] In some embodiments, fans may be provided at positions corresponding to the heater core 4 and the evaporator core 5 .

[0187] In one design, the thermal management system 100 further includes a temperature and pressure sensor and a temperature sensor.

[0188] For example, the inlet of the power battery 1 is connected to a temperature sensor. The inlet of the compressor 3 is connected to a temperature and pressure sensor. The coolant inlet of the motor 2 is connected to a temperature sensor. The coolant outlet of the evaporator core 5 is connected to a temperature and pressure sensor.

[0189] In one design, in order to meet the lightweight requirements of new energy vehicles and meet the multi-scenario requirements of thermal management, an embodiment of the present application provides a control method for a thermal management system 100, the thermal management system 100 including the thermal management system 100 described above, and the control method, as shown in FIG7 , includes: S1-S2.

[0190] S1. Get the current ambient temperature.

[0191] As a possible implementation method, the current ambient temperature is obtained in real time or periodically.

[0192] S2. Determine the operating mode of the thermal management system 100 based on the current ambient temperature to perform thermal management on the power battery 1 , the motor 2 and / or the passenger compartment.

[0193] As a possible implementation method, when the current ambient temperature is obtained, the operating mode of the thermal management system 100 is determined based on the current ambient temperature to perform thermal management on the power battery 1, the motor 2 and / or the passenger compartment.

[0194] In some embodiments, when the current ambient temperature is obtained, the temperature range to which the current ambient temperature belongs is determined. If the current ambient temperature is greater than or equal to a first preset threshold, the current ambient temperature is determined to belong to the first temperature range, and the thermal management system 100 is controlled to enter the first operating mode. If the current ambient temperature is greater than or equal to a second preset threshold and less than the first preset threshold, the current ambient temperature is determined to belong to the second temperature range, and the thermal management system 100 is controlled to enter the second operating mode or the fourth operating mode. If the current ambient temperature is less than the second preset threshold, the current ambient temperature is determined to belong to the third temperature range, and the thermal management system 100 is controlled to enter the third operating mode or the fourth operating mode.

[0195] In some embodiments, if the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, and the power battery 1 is in cooling mode, the thermal management system 100 is controlled to enter the second operating mode. If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, and the power battery 1 is in temperature equalization mode, the thermal management system 100 is controlled to enter the fourth operating mode. If the current ambient temperature is less than the second preset threshold and the power battery 1 is in heating mode, the thermal management system 100 is controlled to enter the third operating mode. If the current ambient temperature is less than the second preset threshold and the power battery 1 is in temperature equalization mode, the thermal management system 100 is controlled to enter the fourth operating mode.

[0196] In other embodiments, when the current ambient temperature is obtained, it is determined whether the current ambient temperature is greater than or equal to a first preset threshold. If the current ambient temperature is greater than or equal to the first preset threshold, the thermal management system 100 is controlled to enter the first working mode. If the current ambient temperature is less than the first preset threshold, it is determined whether the current ambient temperature is greater than or equal to a second preset threshold and less than the first preset threshold. If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, the thermal management system 100 is controlled to enter the second working mode or the fourth working mode. If the current ambient temperature is less than the second preset threshold, the thermal management system 100 is controlled to enter the third working mode or the fourth working mode.

[0197] Exemplarily, the first preset threshold value can be 25°C, the second preset threshold value can be 10°C, the first preset threshold value can also be 28°C, and the second preset threshold value can be 8°C. The embodiment of the present application does not specifically limit the first preset threshold value and the second preset threshold value, and different temperature thresholds can be set by operation and maintenance personnel according to different situations.

[0198] In another case, the current time is obtained, and the season corresponding to the current time is determined. If the season corresponding to the current time is summer, the thermal management system 100 enters the first working mode. If the season corresponding to the current time is spring / autumn and when the power battery 1 requires cooling, the thermal management system 100 enters the second working mode. If the season corresponding to the current time is spring / autumn and the power battery 1 requires uniform temperature, the thermal management system 100 enters the fourth working mode. If the season corresponding to the current time is winter and the power battery 1 requires heating, the thermal management system 100 enters the third working mode. If the season corresponding to the current time is winter and the power battery 1 requires uniform temperature, the thermal management system 100 enters the fourth working mode.

[0199] As can be understood, the thermal management system 100 determines its operating mode based on different temperatures to provide thermal management for the power battery 1, motor 2, and / or passenger compartment. While meeting the lightweight requirements of new energy vehicles, the thermal management system 100 also addresses the diverse thermal management scenarios.

[0200] In one design, in order to accurately perform thermal management on a vehicle, S2 provided in the embodiment of the present application specifically includes: S201-S203.

[0201] S201 : If the current ambient temperature is greater than or equal to a first preset threshold, control the thermal management system 100 to enter a first operating mode.

[0202] For example, if the current ambient temperature is 28°C and the first preset threshold is 26°C, the current ambient temperature of 28°C is greater than the first preset threshold of 26°C, and the thermal management system 100 is controlled to enter the first operating mode, thereby cooling the battery, the motor 2, and the passenger compartment.

[0203] S202 : If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, control the thermal management system 100 to enter the second operating mode or the fourth operating mode.

[0204] As a possible implementation method, if the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, the thermal management system 100 is controlled to randomly enter the second operating mode or the fourth operating mode.

[0205] As one possible implementation, if the current ambient temperature is less than a second preset threshold, the demand mode of power battery 1 is obtained. If the demand mode of power battery 1 is cooling mode, the thermal management system 100 is controlled to enter the second operating mode. If the demand mode of power battery 1 is temperature equalization mode, the thermal management system 100 is controlled to enter the second operating mode.

[0206] In some embodiments, if the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, the temperature of the power battery 1 is obtained. If the temperature of the power battery 1 is greater than the third preset threshold, the demand mode of the power battery 1 is determined to be the cooling mode, and the thermal management system 100 is controlled to enter the second operating mode. If the temperature difference of the power battery 1 temperature is greater than the fourth preset threshold, the demand mode of the power battery 1 is determined to be the temperature equalization mode, and the thermal management system 100 is controlled to enter the fourth operating mode.

[0207] In some embodiments, if the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, then in response to a user operation, if the user operation is to enter the cooling mode, then the second operating mode is entered. If the user operation is to enter the temperature equalization mode, then the fourth operating mode is entered.

[0208] S203 : If the current ambient temperature is lower than the second preset threshold, control the thermal management system 100 to enter the third operating mode or the fourth operating mode.

[0209] As a possible implementation method, if the current ambient temperature is lower than the second preset threshold, the thermal management system 100 is controlled to randomly enter the third operating mode or the fourth operating mode.

[0210] As one possible implementation, if the current ambient temperature is less than the second preset threshold, the demand mode of power battery 1 is obtained. If the demand mode of power battery 1 is heating mode, the thermal management system 100 is controlled to enter the third operating mode. If the demand mode of power battery 1 is temperature equalization mode, the thermal management system 100 is controlled to enter the second operating mode.

[0211] In some embodiments, if the current ambient temperature is less than a second preset threshold, the temperature of the power battery 1 is obtained. If the temperature of the power battery 1 is less than a fifth preset threshold, the power battery 1 is determined to be in a heating mode, and the thermal management system 100 is controlled to enter the third operating mode. If the temperature difference of the power battery 1 is greater than a fourth preset threshold, the power battery 1 is determined to be in a temperature equalization mode, and the thermal management system 100 is controlled to enter the fourth operating mode.

[0212] In some embodiments, if the current ambient temperature is less than a second preset threshold, in response to a user operation, if the user operation is to enter a heating mode, the device enters a third operating mode. If the user operation is to enter a temperature equalization mode, the device enters a fourth operating mode.

[0213] It can be understood that in the embodiment of the present application, the working mode of the thermal management system 100 is determined according to the current ambient temperature, which can accurately manage the thermal performance of the vehicle and improve the user experience.

[0214] In one design, in order to accurately perform thermal management on a vehicle, S202 provided in the embodiment of the present application specifically includes: S301-S302.

[0215] S301 : If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold and the power battery 1 is in the cooling mode, control the thermal management system 100 to enter the second operating mode.

[0216] As one possible implementation, if the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, the temperature of the power battery 1 is obtained. If the temperature of the power battery 1 is greater than the third preset threshold, it is determined that the demand mode of the power battery 1 is the cooling mode, and the thermal management system 100 is controlled to enter the second operating mode.

[0217] S302 : If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, and the power battery 1 is in the average temperature mode, control the thermal management system 100 to enter the fourth operating mode.

[0218] As one possible implementation, if the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, the temperature of power battery 1 is obtained. If the temperature difference of power battery 1 is greater than a fourth preset threshold, it is determined that the demand mode of power battery 1 is the average temperature mode, and the thermal management system 100 is controlled to enter the fourth operating mode.

[0219] S203 provided in the embodiment of the present application includes: S303-S304.

[0220] S303 : If the current ambient temperature is lower than the second preset threshold and the mode of the power battery 1 is the heating mode, control the thermal management system 100 to enter the third operating mode.

[0221] As one possible implementation, if the current ambient temperature is less than the second preset threshold, the temperature of the power battery 1 is obtained. If the temperature of the power battery 1 is less than the fifth preset threshold, the demand mode of the power battery 1 is determined to be the heating mode, and the thermal management system 100 is controlled to enter the third operating mode.

[0222] S304 : If the current ambient temperature is lower than the second preset threshold and the power battery 1 is in the temperature-averaging mode, control the thermal management system 100 to enter the fourth operating mode.

[0223] As one possible implementation, if the current ambient temperature is less than the second preset threshold, the temperature of the power battery 1 is obtained. If the temperature difference of the power battery 1 is greater than a fourth preset threshold, it is determined that the demand mode of the power battery 1 is the temperature equalization mode, and the thermal management system 100 is controlled to enter the fourth operating mode.

[0224] It can be understood that the thermal management system 100 determines the operating mode to be entered based on the current ambient temperature and the demand pattern of the power battery 1, thereby accurately controlling the thermal management of the vehicle.

[0225] In one design, in order to determine a fault of the thermal management system 100, the embodiment of the present application provides a control method for the thermal management system 100, further comprising: S3.

[0226] S3. In response to the maintenance operation, control the thermal management system 100 to enter the fifth operation mode.

[0227] As a possible implementation manner, when a fault occurs in the thermal management system 100 , the thermal management system 100 enters the fifth operation mode in response to a maintenance operation.

[0228] It can be understood that the fifth working mode keeps multiple circuits unblocked, thereby facilitating fault determination.

[0229] To better understand the control method of the thermal management system 100 provided in the embodiments of the present application, FIG8 shows a process for determining the operating mode of the thermal management system 100. Mode Determination: In some embodiments, when the vehicle is started, the mode determination process is entered.

[0230] As one possible implementation method, the current ambient temperature is obtained. If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, and the power battery 1 is in cooling mode, the thermal management system 100 is controlled to enter the second operating mode. If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, and the power battery 1 is in average temperature mode, the thermal management system 100 is controlled to enter the fourth operating mode. If the current ambient temperature is less than the second preset threshold and the power battery 1 is in heating mode, the thermal management system 100 is controlled to enter the third operating mode. If the current ambient temperature is less than the second preset threshold and the power battery 1 is in average temperature mode, the thermal management system 100 is controlled to enter the fourth operating mode.

[0231] As another possible implementation method, the current time is obtained, and the season corresponding to the current time is determined. If the season corresponding to the current time is summer, the thermal management system 100 enters the first working mode. If the season corresponding to the current time is spring / autumn and when the power battery 1 requires cooling, the thermal management system 100 enters the second working mode. If the season corresponding to the current time is spring / autumn and the power battery 1 requires uniform temperature, the thermal management system 100 enters the fourth working mode. If the season corresponding to the current time is winter and the power battery 1 requires heating, the thermal management system 100 enters the third working mode. If the season corresponding to the current time is winter and the power battery 1 requires uniform temperature, the thermal management system 100 enters the fourth working mode.

[0232] As another possible implementation method, as shown in Figure 8, the current ambient temperature is obtained. If the current ambient temperature is greater than or equal to the second preset threshold, it is determined to be summer and the first working mode is entered. If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, it is determined to be spring / autumn. Further, the mode of the power battery 1 is obtained. If the current demand of the power battery 1 is a cooling demand, the thermal management system 100 enters the second working mode. If the current demand of the power battery 1 is not a cooling demand, the thermal management system 100 enters the fourth working mode. If the current ambient temperature is less than the second preset threshold, it is determined that the current season is winter. If the current demand of the power battery 1 is a heating demand, the thermal management system 100 enters the third working mode. If the current demand of the power battery 1 is not a heating demand, the thermal management system 100 enters the fourth working mode.

[0233] In addition, if a detection operation is detected, the detection mode is determined and the fifth working mode is entered.

[0234] An embodiment of the present application further provides a vehicle, comprising the thermal management system 100 as described above.

[0235] An embodiment of the present application also provides a computer-readable storage medium for storing computer-readable instructions. When the computer-readable instructions are executed by a processor, the processor executes the control method as described above.

Claims

1. A thermal management system, characterized in that: The thermal management system includes a power battery, a motor, a heater core, a compressor, an evaporator core, a motor radiator, a low-temperature radiator, a heater, a battery water pump, a motor water pump, a heating water pump, a water-cooled condenser, a battery cooler, a multi-way valve and a connector; The connector is respectively connected to the outlet of the power battery, the inlet of the motor, the outlet of the heater core, the inlet of the motor radiator, the outlet of the low-temperature radiator, the inlet of the battery water pump, the outlet of the motor water pump, the coolant inlet of the water-cooled condenser, the coolant outlet of the battery cooler, and the coolant inlet of the battery cooler; The inlet of the motor water pump is connected to the outlet of the motor, the inlet of the motor is connected to the outlet of the motor radiator, the outlet of the heater is respectively connected to the inlet of the low-temperature radiator and the inlet of the heater core through the multi-way valve, the inlet of the heater is connected to the coolant outlet of the water-cooled condenser, the outlet of the battery water pump is connected to the inlet of the power battery, the inlet of the evaporator core is connected to the refrigerant outlet of the water-cooled condenser, the refrigerant inlet of the water-cooled condenser is connected to the refrigerant outlet of the compressor, the inlet of the compressor is connected to the outlet of the evaporator core, the refrigerant outlet of the battery cooler is connected to the refrigerant inlet of the compressor, and the coolant outlet of the heating water pump is connected to the inlet of the heater.

2. The thermal management system according to claim 1, characterized in that: The multi-way valve is a first three-way valve, the connector is a nine-way valve, the first end of the nine-way valve is connected to the inlet of the motor water pump, the second end of the nine-way valve is connected to the inlet of the battery water pump, the third end of the nine-way valve is connected to the cold liquid inlet of the battery cooler, the fourth end of the nine-way valve is connected to the cold liquid outlet of the battery cooler, the fifth end of the nine-way valve is connected to the inlet of the motor radiator, the sixth end of the nine-way valve is respectively connected to the outlet of the low-temperature radiator and the outlet of the heater core, the seventh end of the nine-way valve is connected to the coolant inlet of the water-cooled condenser, the eighth end of the nine-way valve is connected to the outlet of the battery, and the ninth end of the nine-way valve is connected to the inlet of the motor; The first end of the three-way valve is connected to the outlet of the heater, the second end of the three-way valve is connected to the inlet of the low-temperature radiator, and the third end of the three-way valve is connected to the inlet of the warm air core.

3. The thermal management system according to claim 2, characterized in that: The thermal management system has a first working mode, a second working mode, a third working mode, a fourth working mode and a fifth working mode; In the first working mode, the first end of the nine-way valve is communicated with the fifth end of the nine-way valve, the second end of the nine-way valve is communicated with the fourth end of the nine-way valve, the third end of the nine-way valve is communicated with the eighth end of the nine-way valve, the sixth end of the nine-way valve is communicated with the seventh end of the nine-way valve, the ninth end of the nine-way valve is closed, the first end of the three-way valve and the second end of the three-way valve are both opened, and the third end of the three-way valve is closed; In the second working mode, the first end of the nine-way valve is communicated with the third end of the nine-way valve, the second end of the nine-way valve is communicated with the fourth end of the nine-way valve, the fifth end of the nine-way valve is communicated with the eighth end of the nine-way valve, the sixth end of the nine-way valve is communicated with the seventh end of the nine-way valve, the ninth end of the nine-way valve is opened, and the first end of the three-way valve, the second end of the three-way valve and the third end of the three-way valve are all opened; In the third working mode, the first end of the nine-way valve is communicated with the third end of the nine-way valve, the second end of the nine-way valve is communicated with the sixth end of the nine-way valve, the fourth end of the nine-way valve is communicated with the ninth end of the nine-way valve, the eighth end of the nine-way valve is communicated with the seventh end of the nine-way valve, the fifth end of the nine-way valve is closed, the first end of the three-way valve and the third end of the three-way valve are both opened, and the second end of the three-way valve is closed; In the fourth working mode, the first end of the nine-way valve is connected to the third end of the nine-way valve, the second end of the nine-way valve is connected to the eighth end of the nine-way valve, the fifth end of the nine-way valve is connected to the fourth end of the nine-way valve, and the The sixth end of the nine-way valve is connected to the seventh end of the nine-way valve, the ninth end of the nine-way valve is opened, and the first end of the three-way valve, the second end of the three-way valve and the third end of the three-way valve are all opened; In the fifth working mode, the first end of the nine-way valve is connected to the second end of the nine-way valve, the fourth end of the nine-way valve is connected to the seventh end of the nine-way valve, the fifth end of the nine-way valve is connected to the sixth end of the nine-way valve, the third end of the nine-way valve is connected to the eighth end of the nine-way valve, the fifth end of the nine-way valve is closed, and the first end of the three-way valve, the second end of the three-way valve and the third end of the three-way valve are all opened.

4. The thermal management system according to claim 1, characterized in that: The multi-way valve is a first three-way valve, the connector includes a first four-way valve, a second four-way valve, a third four-way valve and a second three-way valve, the first end of the first four-way valve is connected to the inlet of the battery water pump, the second end of the first four-way valve is connected to the second end of the second four-way valve, the third end of the first four-way valve is connected to the coolant inlet of the battery cooler, and the fourth end of the first four-way valve is connected to the outlet of the motor water pump; The first end of the second four-way valve is connected to the coolant outlet of the battery cooler, the third end of the second four-way valve is connected to the first end of the third four-way valve, and the fourth end of the second four-way valve is connected to the first end of the second three-way valve; The second end of the third four-way valve is connected to the outlet of the power battery, the third end of the third four-way valve is connected to the inlet of the heating water pump, and the fourth end of the third four-way valve is connected to the outlets of the low-temperature radiator and the heater core respectively; The second end of the second three-way valve is connected to the inlet of the motor radiator, and the third end of the second three-way valve is connected to the inlet of the motor radiator.

5. The thermal management system according to any one of claims 1 to 4, characterized in that: The thermal management system further includes a flow channel plate, and the battery water pump, the motor water pump, the heating water pump, the water-cooled condenser, the battery cooler and the connector are integrated on the flow channel plate.

6. The thermal management system according to any one of claims 1 to 4, characterized in that: The thermal management system further comprises a water storage bottle, the outlets of which are respectively connected to the motor and the motor water pump.

7. The thermal management system according to any one of claims 1 to 4, characterized in that: The thermal management system further comprises a liquid storage and drying bottle, the inlet of the liquid storage and drying bottle is connected to the refrigerant outlet of the water-cooled cooler, and the outlet of the liquid storage and drying bottle is connected to the inlet of the evaporator core.

8. A control method for a thermal management system, characterized in that: The thermal management system comprises the thermal management system according to any one of claims 1 to 7, and the control method comprises: The current ambient temperature is obtained, and the operating mode of the thermal management system is determined based on the current ambient temperature to perform thermal management on the power battery, the motor and / or the passenger compartment.

9. The control method according to claim 8, characterized in that: The thermal management system comprises the thermal management system according to claim 3, wherein determining the working mode of the thermal management system based on the current ambient temperature comprises: If the current ambient temperature is greater than or equal to a first preset threshold, controlling the thermal management system to enter the first operating mode; If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, controlling the thermal management system to enter the second operating mode or the fourth operating mode; If the current ambient temperature is less than the second preset threshold, the thermal management system is controlled to enter the third operating mode or the fourth operating mode.

10. The control method according to claim 9, characterized in that: If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold, controlling the thermal management system to enter the second working mode or the fourth working mode includes: If the current ambient temperature is greater than or equal to a second preset threshold and less than the first preset threshold and the power battery is in a cooling mode, controlling the thermal management system to enter the second operating mode; If the current ambient temperature is greater than or equal to the second preset threshold and less than the first preset threshold and the power battery mode is the average temperature mode, controlling the thermal management system to enter the fourth operating mode; If the current ambient temperature is less than the second preset threshold, controlling the thermal management system to enter the third working mode or the fourth working mode includes: If the current ambient temperature is less than the second preset threshold and the power battery is in a heating mode, controlling the thermal management system to enter the third operating mode; If the current ambient temperature is less than the second preset threshold and the power battery mode is the average temperature mode, the thermal management system is controlled to enter the fourth operating mode.

11. The control method according to claim 9 or 10, characterized in that: The control method further comprises: In response to a maintenance operation, the thermal management system is controlled to enter the fifth operation mode.

12. A vehicle, characterized in that: Comprising a thermal management system as claimed in any one of claims 1 to 7.

13. A computer-readable storage medium for storing computer-readable instructions, characterized in that: When the computer-readable instructions are executed by a processor, the processor is caused to perform the control method according to any one of claims 8 to 11.

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